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| author | Michael Brown | 2016-02-19 00:23:38 +0100 |
|---|---|---|
| committer | Michael Brown | 2016-02-19 00:23:38 +0100 |
| commit | 31b5c2e753dbcb3d5023bccc8e644d0bcb56b2ad (patch) | |
| tree | 536967f3f34fba94970a31cbde3fe1d2cf657cce /src/arch/x86/include | |
| parent | [librm] Convert prot_call() to a real-mode near call (diff) | |
| download | ipxe-31b5c2e753dbcb3d5023bccc8e644d0bcb56b2ad.tar.gz ipxe-31b5c2e753dbcb3d5023bccc8e644d0bcb56b2ad.tar.xz ipxe-31b5c2e753dbcb3d5023bccc8e644d0bcb56b2ad.zip | |
[librm] Provide an abstraction wrapper for prot_call
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/arch/x86/include')
| -rw-r--r-- | src/arch/x86/include/librm.h | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/src/arch/x86/include/librm.h b/src/arch/x86/include/librm.h index 379e085a2..2786027a0 100644 --- a/src/arch/x86/include/librm.h +++ b/src/arch/x86/include/librm.h @@ -19,7 +19,19 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); #define LONG_DS 0x40 #endif -#ifndef ASSEMBLY +#ifdef ASSEMBLY + +/** + * Call C function from real-mode code + * + * @v function C function + */ +.macro virtcall function + pushl $\function + call prot_call +.endm + +#else /* ASSEMBLY */ #ifdef UACCESS_LIBRM #define UACCESS_PREFIX_librm @@ -27,6 +39,15 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); #define UACCESS_PREFIX_librm __librm_ #endif +/** + * Call C function from real-mode code + * + * @v function C function + */ +#define VIRT_CALL( function ) \ + "pushl $( " #function " )\n\t" \ + "call prot_call\n\t" + /* Variables in librm.S */ extern unsigned long virt_offset; |